Measured-service telephone system



T. G. MARTIN MEASURED SERVICE TELEPHONE SYSTEM origi al 1mm May 15. 1919 2 Sheets-Sheet 1 Nom 4 1924.

T.-G. MARTIN I 7 MEASURED SERVICE TELEPHONE SYSTEM Original r'ueci May 15, 191.9 2 Sheets-$heet 2 Patented Nov. 4, 1924'.

tJNlTED STATES PATENT OFFICE.

TALBOT G. MARTIN, OF CHICAGO, ILLINOIS, ASSIGNOR'TO, AUTOMATIC ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS MEASURED-SERVICE TELEPHONE SYSTEM.

Original application filed May'15, 1919, Serial No.

297,332. Patent No. 1,459,229, dated J'une 19, 1923.

Divided and this application filed December 4, 1922. Serial No. 604,755.

To all whom it may concern:

Be it known that I, TALBOT G. MARTIN, a citizen of the United States of America,;and a resident of Chicago, Cook County, and State of Illinois, have invented certain new and useful Improvements in Measured- Service Telephone Systems, of which the following is a specification,

The present invention relates in general to measured service telephone systems, but is concerned more. particularly with improved circuits. and; devicesfor. manually controlling a, paystationor coin collector in such a system; and the object ofthe invention is to provide means for operating a coin collector of the coin first type, when calls are made by an operator through an automatic switch, to an, automatic subscribers line which isprovided witha coincollector of the above type.

This application is a division of an application bearing Serial No. 297,332, filed May 15, 1919, which eventuated in PatentNo. 1,459,229,, June 19, 1923.

Referring to the drawings, Fig. 1 shows a manual calling line, and an operators cord. circuit adapted for. use in answering and completing calls initiated by such lines. Fig. 2 shows a connector switch. which. is accessible to a cord. circuit such as shown in Fig. 1, and is used to complete. connections to any of a number of called lines such as lineA.

Referring now particularly to Fig. 1f, the calling manual station B is ofthe usual type, its line conductors terminating in the usual answering jack, with which i'sassociated the line signal 81 controlled by the usual line and cut off relays. The cord circuit, F is. of; the usual type used by an operatorofv a semi-automatic system; in. e tending. connections; to. automatic substations, the, circuits; having: been modified, to take care of certain. new teatnreswhi hwill be described the de ailed escrintion which isto follow.

Referring nowto; Fig. 2, the; connector-H is of the; well known Strowger type; and is accessible to thecord circuit F for-"extending connections initiated by" manual lines such as B to any of the automatic linessuch as A. The substation A is of the-usual type used in modern automati lephonesystems, and

is equipped with a coin collecting device of the coin first type.

It is understood that any standard type I of coin collector or paystation device, such as that, shown in U. S. Letters Patent No. 1,043,219v granted November 5, 1912, toOLF. Forsberg, may be used with this invention which is adapted to receive a coin deposited before a call is initiated and having a chute for returning the coin if the call isunsuccessful, and for collecting the coin if'the call is successful. I have only shown the: circuits of the collector; used asmyinVentiQn by means of the-lamp 81 which; is extinguished when the, operator inserts theplug into the jack of the calling line, the operator then throws'her listening key, obtains the wanted number and inserts the calling plug P into a jack such as J leading toan idle connector switch such as H (Fig. 2.) which has access to the multiple normals of the line A. The line relay 82 of the con nector H is energized in series with the coil 80 of the cord circuit and the 'la-mp 84: of the. cord circuit islighted. through the springs 85 of relay 8.6. The operator then throws her, calling device; key to; bridge the calling device; 87 across the-cord; circuit in seri s' ith the-line. relay 82.. Relay- 82; closes th circu t of why 88. h ch. pr p r he cir it-1 of; low relay and; e tical magne QQandcloses thespring 9.1., 9,2 and;93 into contact. When thecalling; device is operated for the first digit of; the. callednumber the the circuit of slow relay 9st and rotary magnet 95 in multiple, and whenrelay 82 is operated for the next digit of the calleo nunr ber magnet 95 operates to step the wipers of theswitch E into engagement with the normals 96, 97 and 98 of the line A. Relay 94 remains energized for a short time after the rotary impulses cease to hold the private wiper in connection with the busy relay 99 so that if the called line is busy the relay 99 will operate to connect a busy tone to the operator. relay 9% upon falling back, closes a circuit for the upper winding of relay 100 from ground at springs 91 and 92, through. said winding and through relay 22 and magnet 21 of the called line to battery. Relay 100 energizes and locks energized to cut the called line through to the ringing circuit and ring cut off relay 101. Vt hen the caller subscriber answers relay 101 energizes and completes the circuit of the back bridge-relay 86, which also energizes in series with the called line to open the springs 85 to extinguish the lamp 84 to inform the operator that the called man has answered.

The special relay 102 in series with the line relay is a polarized relay which does not operate with the usual battery'potential, but only with a battery of 110 volts ofeither polarity. Now, when the called subscriber answers and the operator finds that the right party has answered the operator first informs him that the calling party has asked to have the charges reversed and requests him to drop a coin of the proper denomination for the call. The called subscriber deposits the coin and the operator then throws her key 103 to energize the relay 104E, connecting the positive high voltage battery 105 out over the trunk line and through'relay 102 to ground. Relay 82 is held energized and relay 102 operates to attract its armature in such a direction as to close the springs to connect the high voltage battery 108 out over the lower talking conductor to conductor 97 through springs 7 of the calling de vice of station A, springs 11 and 10, springs 17 and 18, and magnet 13 to ground, thus depositing the coin. The operator then re stores the talking circuit and allows the two subscribers to converse in the usual manner.

Should the operator be unable to get the calling party after the called man has deposited the coin or for any other reason desire to refund'the coin after it is deposited by the called man she may throw the key 110 to connect the reversed high voltage battery to relay 120 which in turn projects negative. high voltage battery to the coin collect magnet of the called line to operate said magnet in a direction to refund the charge.

In some instances the manual subscriber may not desire that the charge be reversed, 1n whlch case the operator w1ll charge the If the line is idle however, the

calling subscriber for the call in a manner well known in manual practice.

It will be seen, therefore, that I have pro vided a very efficient means for manually controlling a coin collector of the coin first type in a semi-automatic system.

Having fully described and ascertained the features and aspects of the invention, what is considered to be new and is desired to have protected by Letters Patent will be pointed out in the appended claims.

What I claim is:

1. In a telephone system, a line, a pay station for the line, an automatic switch for seizing said line, an operator having access to said switch and having means for controlling the switch to seize the line, a magnet for the pay-station for either refunding or collecting the coin, and means in the switch controlled by the operator for operating said magnet to collect or refund the coin.

2, In a telephone system, a line, a paystation for the line, an automatic switch for seizing said line, an operator having access to said switch, and having means for controlling the switch to seize the line, a polarized magnet for the pay-station for eitherrefunding or collecting the coin, said magnet non-responsive to normal current in the line circuit, and means in said switch controlled by the operator for connecting either a positive or negative high potential current source to said magnet to collect the coin in one case and to refund the coin in another case. I

3. In a telephone system, a calling and a called line, an operators switchboard, means whereby the operator can establish a talking circuit between said lines, said means including an automatic progressively movable switch between said operators switchboard and the called line, paystation mechanism at the station on the called line, and means controlled by the operator over said talking circuit for collecting or refundingcoins deposited in said paystation.

4. In a telephone system, a calling and a called line, an operators switchboard, means whereby the operator can establish a talking circuit between said lines, said means including an automatic progressively movable switch, an inductive connection included in said talking circuit between said switchboard and said called line, paystation mechanism at the station on the called line, said mechanism responsive to high voltage currents applied to the talking circuit at the said switchboard to collect or refund deposited coins, and means for relaying such currents. past said inductive connection to control said paystation as set forth,

5. In a telephone system, lines, paystations thereon having charge assessing means, an automatic progressively movable switch, an operators' switchboard, means including said switch for setting up a talking connection from said switchboard to a desired one of said lines, and means controlled from said switchboard and over said talking connection for operating the charge assessing means at the paystation on the connected line.

6. In a telephone system, lines, each having a coin collect and refund paystation thereon, an operators switchboard, an automatic progressively movable switch, means for setting up a connection from said switchboard to a desired one of said lines, said connection including said switch, and means controlled from said switchboard through said switch to selectively control the paystation on the selected line to either collect or refund a coin deposited therein.

7 In a telephone system, a line having a coin collect and refund paystation thereon, an operators switchboard, an automatic progressively movable switch, means for setting up a connection through said switch from said switchboard to said line, and means ing currents of different characters to said connection at said switch to operate said paystation to collect or refund a coin deposited therein.

8. In a telephone system, subscribers lines, a paystation on each of said lines, an operators switchboard, means including an automatic operator controlled numerical switch for selecting a desired one of said lines and extending a talking connection thereto, said connection comprising two inductively connected sections, current sources of different characters, and means controlled by the operator at said switchboard for connecting one or the other of said sources to the second section of the talking circuit to collect or refund a coin deposited .in said paystation.

In witness whereof, I hereunto subscribe my name this 1st day of December, A. D. 1922.

TALBOT Gr. MARTINa controlled from said switchboard for apply- 

